Google is showing its ecological side with Summer of Green, an attractive Google Maps mashup that, in a partnership with the Earth Day Network, "highlights some planet-friendly travel tips for top U.S. travel destinations as well as how to use Google Maps in your daily routine to find and support green activities." Though the site is a bit overloaded just now (when will Google learn that any site it launches is going to get pummeled?), it's very slick, clean, and easy to use.
